Hoisting apparatus



M. N. BAKER..

HOlSTiNG APPARATUS.

APPLICATION FILED MAR. 5, 1920.

Patnted- May 10,1921.

2 SHEETSSHEET 1.

avwawlio'a MORE/AN MBA/(ER s 3 r 6M M. N. BAKER.

HOISTING APPARATUS.

APPLICATION FILED MAR. 5. 1920- LWFJM. P te ted May 1m, 1m.

2 SHEETS-SHEi-IT 2- 2 i /7 20 1; E, .4 N20 3- is b 5' /7 9 I- /9 4 I 4 a"I Mam/AN N BAKE r2 WJi/Maoo v MORVAN ll'. BAKER, F DORCI-IESTER,NEBRASKA.

HOIS'IING APPARATUS.

Specification of Letters Patent.

Patented llllay ME, 1921.

' Application filed March 5, 1920. Serial No. 363,540.

To aZZ whom it may concern Be it known that l, lriionvAN N. BAKER, acitizen of the United States, residing at Dorchester, in Ealine county,in the State of Nebraska, have invented certain new and usefulimprovements in Hoisting Apparatus, and have described the same in thefollowing specification, illustrated by the accom mnyin g drawings.

ltiy invention relates to that kind of hoistapparatus which individuallycomprises bucket and means for tipping the same to pour out itscontents, and which is commonly used for elevating and for discharg ingfrom an elevated position successive quantities of water, sand, grain,ensilage, broken ore, or other disunited or liquid material. It is themain object of the invention to simplify the construction of this kindapparatus; to adapt the same to be operated by a single attendantstationed at the level where the bucket is filled; to guide the loadedbucket to its discharging position; to cause the bucket, after it hasbeen emptied, to right itself automatically while going down to berefilled; and in general to produce a superior apparatus of thespecified kind. To accomplish these objects I incorporate in my improvedapparatus, as parts thereof, a bucket body having late *al trunnionsnormally positioned higher than its center of gravity, a swinging bailspanning the bucket body and having terminal bearings around thetrunnions respectively, a pair of projecting lugs on opposite sides ofthe bucket body in parallelism with the truunions, suspending means,attached to the bail, for pulling up and lettin down the bucket, and anoverhead two-rail track, adapted to be engaged and traveled by the lugsand trunnions when the bucket is drawn up.

In said drawings, illustrating the best manner in which 1 havecontemplated applying the principles of the invention, Figure 1 is aside elevation of ahoisting apparatus which is constructed in accordancewith these principles, and adapted to hoist and deliver ensilage from asilo. Fig. 2 is av front elevation of the same apparatus. Figs. 3 and tare details.

In this illustrative specimen of the in vention, the bucket body,denoted by the numeral 1, is a sheet-iron cylinder open at the top andclosed at the bottom. It has the diametrically opposite trunnions 2 and2 parallel therewith.

extending therefrom ata level slightly above its gravitational center,and the diametrically opposite trunnion-like lugs 3 and 3' similarlyprojecting from opposite sides of the bucket body above the trunnionsand The hail of the bucket comprises a pair of convergingly bent bars 4:and 4:, which have terminal eyes encircling the trunnions respectively,and are riveted, at the middle of the bail to opposite sides of theinterposed shell 5 of the sheave, or grooved pulley, 6. In order thatthe bucket when free may hang true in its upright position, shown inbroken lines in Fig. 1, each of these bars has a backward incurvation,as at 7, for the accommodation of the radial lugs. The bucket is shownmounted in a rectangular frame comprising the front corner posts 8 and9, which may be parts of a ooorcase of a silo, the back corner posts 10,the front and back crossbars 11, and the bar 12, which spans thecrossbars 11 con trally as a simple beam at the top of the frame. To thecentral bar 12 is attached by the bracket 13 the rope, or chain 14,which runs in and suspends the described sheave '6 and thereby operatesthe bucket; while to the same bar, and directly back of the sheave, areattached by the hangers 15, the loose grooved pulleys 16 over which thisrope runs either to the hand of the attendout below or to someconvenient source of tension regulated by him.

For the purpose of guiding and tipping the bucket, the duplicate siderails 17 and 17 are immovably mounted in the upper part of the describedframe by the rear brackets 18 and the brackets or forward extensions 19.They are positioned side by side in vertical planes that form rightangles with the trunnion axis; they are spaced to admit the bucket bodyfreely between them and to engage, through the antifriction rollers 20,the outer end portions of the described trunnions-and radial lugs; eachof them has a forwardly ascending rear portion, a descending forwardportion and an intermediate and higher arcuate portion; and both of themconstitute an overhead track on the underside of which these rollers mayrun. To hold the descending lugs and their rollers to the rails 17 atthe forward end of this track, bent metallic plates 21, riveted to therails respectively, form vertical retaining channels 22, for theserollers respectively. One of these plates and channels is shown indetail in Figs. 3 and 4E. At'a convenient distance above the silo floor23, and between the posts 8 and 9, is mounted the forwardly directedchute 24, which is positioned and adapted to avoid contact with theascending bucket, and to hit and cooperate with the descending bucket,in the manner hereinafter described.

The attendant, standing in the silo, loads the bucket, positioned asshown in broken lines in Fig. 1. Then he pulls down the free endof therope, and thereby hoists the bucket, bringing first the lugs and thenthe trunnions up to the overhead track. As he continues pulling therope, the lugs and trunnions, with their respective rollers, travelforward on the underside of the track. This tilts the bucket forwardrotatively on its trunnions and advances the same to the stoppingposition of partial inversion shown in full lines in Figs. 1 and 2, andpours and empties its contents onto the chute below. By relaxing therope the attendant then lowers the bucket, which, being righted by itsown weight, aided, as occasion may require, by contact between the upperend cf the chute and that part of the bucket which is hidden by the post8 in Fi 1, descends to its original position ready to be refilled.

I claim as my invention- 1. Hoisting apparatus comprising a bucket bodyhaving trunnions and self-righting thereon, a bail spanning the bucketbody and having terminal eyes wherein the trunnions may turn, a groovedpulley mounted on the bail, a rope running on the pulley, for raisingand lowering the bucket, a pair of lugs projecting from the bucket bodyin parallelism with the trunnions, and an overhead single-coursetwo-rail track adapted to be traveled by the trunnions and the lugs.

2. Hoisting apparatus comprisinga bucket body having trunnions andnormally poised upright thereon, a bucket bail having bearings for thetrunnions respectively, a grooved pulleycarried by the bail, asuspending rope running in the grooved pulley for the purpose of raisingand letting down the bucket, a pair 01" lugs projecting from the bucketbody in parallelism with the trunnions, a single-course tworail trackadapted to be traveled simultaneously by the lugs and trunnions, and achute at the front end of the track.

' 3. Hoisting apparatus comprising a bucket body having trunnions andnormally selfrighting thereon a bucket bail having end bearings whereinthe trunnions may turn, a pulley shell forming a middle part of thebail, a grooved pulley therein axially parallel with the trunnions, asuspending rope running in the grooved pulley and adapted to raise andlower the same in a vertical plane, a pair of lugs projecting fromopposite sides oi? the bucket body in parallelism with the trunnions,and an overhead singlecourse two-rail track positioned to be en gagedand traveled by the lugs and trunnions when the bucket is drawn up bythe suspencing rope.

l. Hoisting apparatus comprising a bucket body having trunnions andnormally selfrighting thereon, a pair of projecting lugs on oppositesides of the bucket body in parallelism'with the trunnions, a bucketbail adapted to swing on the trunnions and to engage the lugs, a pulleyshell forming a middle part of the bail, a grooved pulley thereinnormally in axial parallelism with the lugs and trunnicns, a suspendingrope running in the grooved pulley and adapted to raise and let down thesame in its normal plane, and an overhead two-rail track, adapted toengage the lugs and trunnions when the bucket body is drawn upward bythe suspending rope, and having a forwardly ascending rear portion, adescending forward portion and an intermediate arcuate portion.

\Vitness my signature at Dorchester, Nebraska, February 27, 1920.

MORVAN N. BAKER.

